Dispensing faucet



Patented Aug. 17, 1926.

UNITED STATES PATENT OFFICE.

HOWARD P. DOBFF, F CHICAGO, ILLDTOIS, ASSIGNOR TO CONRAD CHICAGO, ILLINOIS.

DISPENSING FA'UGET.

Application led April 20, 1925. Serial Ho. 24,381.

This invention relates to that type of liquid dispensing faucets in which at each manipulation of the appliance, a measured quantity of the liquid is forcibly ejected, and the present improvement has for its objects:

To provide a simple and `durable formation and association of parts, in which the movable member of the dispensing faucet, is adapted, in a manual operation of the same,l

to create a pressure which as said member reaches the end of` its manual actuation is adapted to forcibly eject from the chamber of the faucet a measured volume of the liquid to be dispensed.- The return mover ment of the movable faucet member to a normal position being effected. by a spring.

To provide in connection with the ltype of valve above described, an auxiliary stop valve operatively .associa d with the movable faucet member and a lapted in a normal position of the faucet parts to close the outlet passageof the faucet to prevent seepage and dripping of the liquid, all as'will hereinafter more fully'appear.

In the accompanying drawingz- Fig. l, is a longitudinal sectional elevation of afaucet embodying the preferred form of the invent-ion, with the parts shown in the normal position receiving liquid from a supply tank or container. v Fig. 2, is a companion view showing the parts-in a position for a forcible discharge of liquid from the faucet.

Fig. 3, is a detail longitudinal section of a modification.

Like reference numerals indicate like parts- I in the different views.

In the present dispensing faucet structure, the barrel 1 is of a cylindrical form with ,its bore or piston chamber closed at its forward end by a centrally oriced head 2 in which the handled stem 3 after described piston or plunger has movement and guidance. At its rear and open end thebarrel 1 is ixedly attached b screw thread formations to a carrying ead 4, that in turn is formed for fixed attachment to a liquid soap supply tank or the like.y

T he piston or plunger 5 above referred to, 1s of a cylindrical form having a close sliding fit along its entire .length in the `bore ofA the barrel 1 and preferably car-- rying a rino packing 6 to resist leakage past the piston.h In thi; referred construction shown, the rear portion 7 of the piston 6 -to provid or chamber of said body the of the hereinis of the tubular shellform shown, in order e a maximum amount of space within the faucet and also permit of the use of an operating spring of a maximum length without an undue increase in the length of the faucet body.

The spring 8, above referred to, is preferably of the coiled wire type shown, and is arranged between the closed forward end of the shell 7 and the front end of the carrying head 4, aforesaid, with a tendency to force the piston 6 and piston shell 7 'to the normal forward position shown in Fig. 1.

A longitudinal inlet passage 9 is formed in the carrying head 4 and has communiwith a longitudinal passage 9 inthe barrel bodyhwiththe passage 9 extending a dis tance forward of the rear end of said barrel body to have communication with the bore by a lateral pas sage 10 preferably in the'form of an annula'r groove in said bore as shown.' The def scribed location of the lateral passage or groove 10 a distance forward of the rear end of the bore of the barrel 1, constitutes a material feature in the in that the piston shell 7 as it moves backward closes said passage 10v and converts plston shell 7 hascontinued rearward move* ment acts tocompress the gaseous upper portion of theconte'nts of said chamber to e5- of the off/set form shown and provided with a. valve seatfor an auxiliary valvemember hereinafter described, and the piston shell `7 is formed with a lateral passage 12 in operative relation to 'said outlet passage 11., and so positioned that with said piston shell 7 in a lforward position shown in Fig. 1, the passage 11 is closed, while with said piston shell 7 in a rearward position shown in Fig.

l2, the aforesaidpassage 11, will have communication with the passage 12 and the chamber of the faucet to permit a forcible e'ection of the lower fluid contents of said chamber under the energy of theupper gaseous contents, compressed -in the manual interior of the faucet body into a cham ber of a closed nature, in which as said` formed.,

.1.v Donar, or

present construction,

rearward movement of the piston 5 and piston shell as heretofore set forth.

With a view to maintain registry of the passages 11 and 12, when an accidental turning movement of the piston 5 and piston shell 7 'takes place in actual use, the piston Y municating with'the passage 11 for a like by a spring object, as illustrated in Fig. 3.

The auxiliary valve member heretofore referred to, comprises a valve stem 15, sliding in a longitudinal passage in the barrel body 1 with its forward and preferably conical end adapted to seat itself on tlie valve seat of the heretoforedescribed outlet passage 11 to attain an effectiveclosure of said passage when in place. Atits rear end the valve stem 15 is provided with a lateral head 16 projecting into the path of the rear end of the piston shell 7, .so as to receive movement therefrom and by a removal of its conical end from the aforesaid valve seat of the passage 11 effect an opening of said passage, as the piston 5 and piston shell 7 nears the end of their rearward stroke. 'In the construction shown, the valve stem 15 is impelled to its forward and normal position Having thus fully described my invention, what I claim and Vdesire to secure by Letters Patent, is

1. In a dispensing faucet of the type described, the combination of a barrel having a cylindrical bore and a longitudinal inlet passage communicating with said bore a distance in front' of the rear end of the same, a carrying head attached to the rear end of the barrel and provided with a longitudinal passage and intermediate annular groove adapted for communication with the longitudinal passage of the barrel, said barrel having an outlet passage a distance in. front of said inlet passage, a piston arranged in said bore and having an operating stem extending outside the barrel, the piston having position,

17 as shown in Figs. 1 and 2.'

a passage adapted to register with the aforesaid outlet passage with the piston in its rearward position, and a spring tending to move said iston 1n' a forward direction.

2. In a. dispensing faucet of the type described,

municating with said bore a distance in front of the rear end of the same, said barrel having an outlet passage a distance in front the combination of a barrel having` a cylindrical bore and an inlet passage comof said inlet passage, a piston of a straight e lindrical form having a close sliding fit op its length in the bore of the barrel an aving a tubular shell portion on its yrear end, an operating stem on said piston extending outside said barrel, the shell portion of the piston having a lateral passage and associated peripheral groove adapted to register' with the aforesaid outlet passage with the interior of the piston in a rearwar the outlet passage having a valve seat, a valve member moving in unison with the piston andadapted to engage said seat, and a spring tending to move saidl piston in a forward direction.

3. In a dispensing faucet of the typedescribed, the combination of a barrel having a cylindrical bore and a longitudinal inlet passage communicating with said bore a distance in front of the rear end of the same, said barrel havin an outlet passage of an offset form provi ed with a valve seat, said passage being located a distance in front of the aforesaid' inlet passage, a piston arranged in the bore of the barrel and having an operatin stem extending outside thevbarrel, the piston havinga passage-'adapted to register with the aforesaid outlet passage with the piston in its rearward position, a spring tending to move said piston in a forward direction, a valve stem having a valve head at its forward end adapted to engage the valve seat of the outlet passage afored To said, and at its rear end a lateral projection extending into the path of the piston, and a Y spring tending to move said stem in a forward direction.

.Signed at Chicago, Illinois, of April, 1925.

this 15th day HOWARD P. DORFF.I 

